Jet airplane



FIG. 1 is a top plan view of the jet airplane;

FIG. 2 is a view of one side of the jet airplane, with the opposite side being a mirror image thereof;

FIG. 3 is a front plan view of the jet airplane;

FIG. 4 is a back plan view of the jet airplane; and,

FIG. 5 is a bottom plan view of the jet airplane. 

The ornamental design for a jet airplane, as shown and described. 